//==========================================================================
// Copyright (c) 2000-2008,  Elastos, Inc.  All Rights Reserved.
//==========================================================================
/*
 * Copyright (c) 1997-1998 University of Utah and the Flux Group.
 * All rights reserved.
 *
 * This file is part of the Flux OSKit.  The OSKit is free software, also known
 * as "open source;" you can redistribute it and/or modify it under the terms
 * of the GNU General Public License (GPL), version 2, as published by the Free
 * Software Foundation (FSF).  To explore alternate licensing terms, contact
 * the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
 *
 * The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GPL for more details.  You should have
 * received a copy of the GPL along with the OSKit; see the file COPYING.  If
 * not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
 */
#include <ddk.h>
#include <osenv.h>
#include <compiler.h>

#define    DAC_R_INDEX    0x03c7
#define    DAC_W_INDEX    0x03c8
#define    DAC_DATA       0x03c9

extern int         vgaIOBase;
extern Boolean DAC8Bit;

void
Video_WriteDAC(int index, int r, int g, int b)
{
    int i;

    Outb(DAC_W_INDEX, index);

    if (DAC8Bit) {
        Outb(DAC_DATA, r);
        Outb(DAC_DATA, g);
        Outb(DAC_DATA, b);
    } else {
        Outb(DAC_DATA, r >> 2);
        Outb(DAC_DATA, g >> 2);
        Outb(DAC_DATA, b >> 2);
    }

    i = Inb(vgaIOBase + 0x0A);   /* reset flip-flop */
    Outb(0x3C0, 0x11 | 0x20);
}

void
Video_ReadDAC(int index, int *r, int *g, int *b)
{
    Outb(DAC_R_INDEX, index);
    *r = Inb(DAC_DATA);
    *g = Inb(DAC_DATA);
    *b = Inb(DAC_DATA);

    Outb(DAC_W_INDEX, 0);
}
